JP2009266261A - Optical disc drive and electronic apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an optical disc drive and an electronic apparatus in which deterioration in performance such as reduction in a laser element life due to a rise in laser element temperature can be prevented. <P>SOLUTION: The optical disk drive D is provided with a decorative laminated board 10 having a wind guidance opening 21 at a region facing to a laser element 8a of an optical pickup member 7 when the optical pickup member 7 is moved to the outermost periphery portion of a rotated disc 2, and a disc tray member 3 having a wind guidance wall 22 extended from the wind guidance opening 21 or the vicinity to the reversed rotation direction of the disc 2 at a surface facing to the optical pickup member 7 having moved to the outermost periphery portion of the disc 2. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an optical disc apparatus and an electronic apparatus that record and reproduce data by rotating a disc that is an information recording medium.

The optical disk device is a data storage device that records data on the disk surface or reproduces data recorded on the disk surface while rotating a disk-shaped disk that is a data recording medium.
In this optical disc apparatus, an electronic component (optical head) including a semiconductor laser element, a laser light receiving unit, etc. used as a signal writing means for recording data and a signal reading means for reproducing data is an optical pickup or It is simply called pickup.

  Further, as a disk as a data recording medium, for example, CD-ROM (Compact Disk Read Only Memory), CD-R (Compact Disk Recordable), CD-RW (Compact Disk ReWritable), DVD-ROM (Digital Versatile Disk Read) Only Memory), DVD-R (Digital Versatile Disk Recordable, write once DVD that can be written only once), DVD-RW (one rewritable DVD standard), DVD-RAM (Digital Versatile Disk Random Access Memory), DVD + R (a recordable DVD standard), DVD + RW (a rewritable DVD standard), BD-ROM (Blu-ray (registered trademark) Disc Read Only Memory), BD-R (Blu-ray (registered trademark) Disc Recordable ), BD-RE (Blu-ray (registered trademark) Disc Rewritable) and the like.

  2. Description of the Related Art In general, an optical disc apparatus is mounted on an electronic device such as a personal computer that includes a central processing unit (CPU) that performs access control and arithmetic processing on the optical disc apparatus. When the electronic device to be mounted is a desktop personal computer, the optical disk device is generally referred to as a half height optical disk device, whereas when mounted on a notebook personal computer (portable personal computer). Generally, it is called a slim type optical disc apparatus. The half height means that the thickness of the internal drive is about 1.6 inches (4.1 cm).

Currently, there is a demand for a larger data storage capacity in an optical disc apparatus.
Therefore, it is necessary to make the disk recording layer multi-layered, but in order to cope with multi-layer recording, the optical output of the semiconductor laser is further increased as compared with single-layer recording. As a result, the temperature of the laser element rises rapidly, and the problem of deterioration in the quality of the optical disk apparatus becomes prominent due to a decrease in element life and further deterioration of various components.

  In particular, in the case of a slim type optical disc apparatus, the housing volume is smaller than that of a half-height type optical disc apparatus and high-density mounting is performed. Therefore, the laser element is exposed to a higher temperature atmosphere than the half-height type optical disc apparatus. In addition, when the optical pickup moves to the outermost peripheral position of the disk, the temperature of the laser element is increased due to the longer operating time of the laser element, the heat generated by the laser element being trapped at the outermost peripheral position of the disk due to the air flow of the disk rotation, etc. In order to show the maximum value, it is more necessary to effectively dissipate the heat generated from the laser element at this time.

As a countermeasure, for example, in Patent Document 1 and Patent Document 2, in the slim type optical disk apparatus, by providing a ventilation hole near the outermost outer periphery of the disk of the optical pickup, that is, the decorative plate, by air swirling as the disk rotates. A method of dissipating heat from the optical pickup by an air flow passing through the generated ventilation holes has been proposed.
Japanese Patent Laid-Open No. 11-25667 (paragraphs 0012 to 0014, FIG. 1, FIG. 2, etc.) JP 2005-1000056 (paragraph 0043, FIG. 2, FIG. 6, FIG. 8, etc.)

  By the way, the mounting position of the laser element of the optical disk apparatus differs for each optical pickup, and in the multilayer recording described above, the disk rotation speed cannot be increased as much as the single-layer recording. Therefore, as disclosed in Patent Document 1 and Patent Document 2, simply by providing a ventilation hole in the decorative plate, the flow velocity of the air flow around the laser element is locally reduced with respect to the laser elements having different mounting positions for each optical pickup. Therefore, it is impossible to promote the heat dissipation of the laser element, and it is impossible to solve the problem of quality degradation due to the generated heat.

Therefore, in order to promote the heat dissipation of the laser element with respect to the laser element having a different mounting position for each optical pickup, when the optical pickup moves to the outermost peripheral position of the disk where the laser element temperature shows the maximum value, A new structure is required to locally introduce the air flow generated by the rotation to the periphery of the laser element.
In particular, in a multilayer recording in which the disk rotation speed cannot be significantly increased and the laser light output is higher than the single-layer recording, a new structure for increasing the air flow velocity around the laser element is further required. Is done.
As described above, in the optical disk apparatus, there is a technical problem to be solved that, as the laser element temperature rises, the life of the laser element is reduced and the performance of the optical disk apparatus is deteriorated.

  In view of the above circumstances, the present invention provides an optical disc apparatus and an electronic apparatus capable of preventing deterioration in performance such as a decrease in the lifetime of a laser element accompanying an increase in the temperature of the laser element when performing not only single-layer recording but also multilayer recording. With the goal.

  In order to achieve the above object, an optical disk apparatus according to the first aspect of the present invention includes a disk tray member used for loading and unloading a disk, which is an information recording medium, and a laser element that oscillates a laser beam applied to the disk. Provided between an optical pickup member, a disk rotation mechanism for rotating the disk, a feed mechanism for moving the optical pickup member between the inner periphery and the outer periphery of the disk, and the mounted disk and the control unit mounted The decorative plate material has an air guide hole in a region facing the laser element of the optical pickup member when the optical pickup member moves to the outermost peripheral portion of the disk to be rotated. The disc tray member is formed on the surface facing the optical pickup member moved to the outermost periphery of the disc from the air guide hole or the vicinity thereof. And a wind guide wall portion extending in the counter-rotational direction of the disk.

  According to a second aspect of the present invention, there is provided an electronic apparatus comprising: a disk tray member used for loading and unloading a disk as an information recording medium; an optical pickup member having a laser element that oscillates a laser beam applied to the disk; An optical disc comprising: a disc rotating mechanism for rotating; a feed mechanism for moving an optical pickup member between an inner peripheral portion and an outer peripheral portion of the disc; and a decorative plate material provided between the mounted disc and a control portion to be mounted The decorative board material has an air guide hole in a region facing the laser element of the optical pickup member when the optical pickup member moves to the outermost peripheral portion of the disk on which the optical pickup member is rotated. Extends in the counter-rotating direction of the disc from the air guide hole or its vicinity on the surface facing the optical pickup member that has moved to the outermost periphery of the disk It is provided an optical disk apparatus having a wind guide wall part.

  According to the optical disk apparatus of the present invention, it is possible to realize an optical disk apparatus and an electronic apparatus that can prevent performance degradation such as a decrease in the lifetime of the laser element accompanying an increase in the laser element temperature.

Embodiments of the present invention will be described below with reference to the accompanying drawings.
FIG. 1A is a plan view showing an outline of the internal configuration of the optical disc apparatus D according to the first embodiment of the present invention. In FIG. 1A, the top cover 1b (see FIG. 1B) of the optical disk apparatus is omitted and the disk 2 is indicated by a two-dot chain line. FIG. 1B is an enlarged cross-sectional view taken along the line AA of the optical disk apparatus D shown in FIG. 1A with the top cover 1b attached to the front surface side. In this figure, the disk 2 is shown by a solid line. ing.

<< Outline of Optical Disc Device D of Embodiment >>
The embodiment according to the present invention exemplifies a case where the present invention is applied to a slim type optical disk apparatus (hereinafter referred to as an optical disk apparatus D).
The optical disk apparatus D of the embodiment pays attention to the fact that the laser element 8a reaches a high temperature when it reaches the outermost periphery of the disk 2 during recording, reproduction, etc. performed using the laser element 8a. In the region of the decorative plate 10 facing the laser element 8a that has moved to the part, an air guide hole 21 that guides the air flow caused by the rotation of the disk 2 is formed, and a virtual contact 2a that contacts the outer edge of the disk 2 (see FIG. 4 (a)) to the location following the air guide hole 21 of the decorative board 10 along a smooth line extending in the same direction as the rotation direction of the disk 2 (the direction of the arrow α2 in FIG. 1A). A wind wall 22 (10b) is provided.

The air guide wall 22 is provided so as to extend from the air guide hole 21 of the decorative plate 10 or the vicinity thereof in the counter-rotating direction of the disk 2, thereby obtaining a certain air guide effect.
As a result, an air flow gradually flowing in the clockwise direction from the center of the disk 2 to the outermost periphery generated by the rotation of the disk 2 during recording / reproduction is applied to the air guide wall 22 and guided to the air guide hole 21. This is blown toward the outermost peripheral portion of the disk 2 through the air holes 21 to effectively cool the laser element 8a that has reached a high temperature, thereby realizing an improvement in performance.

<< First Embodiment >>
<Overall Configuration of Optical Disc Device D>
As shown in FIG. 1, an optical disc apparatus D according to the first embodiment includes a turntable 5 that rotates and drives a disc 2 placed during recording and reproduction of information inside a bottom plate cover 1a that forms an outer casing. The disc chuck 6 that is attached to the turntable 5 and that fixes the disc 2 placed on the turntable 5 with elastic force, the spindle motor 4 that rotationally drives the turntable 5, and the disc 2 that is rotated by the turntable 5. An optical pickup member 7 that moves in the radial direction and bears recording / reproduction on the disk 2, a disk tray 3 that covers the recording surface and outer peripheral surface of the disk 2 on the turntable 5 with clearance, and the turntable 5 Decorative plate 1 which is disposed with a clearance on the recording surface of disc 2 and shields radio waves from a circuit board which will be described later When the spindle motor 4, the disk tray 3, and the decorative plate 10 is formed and a mechanical chassis 12 of the support member fixed (see Figure 1 (b)).

Hereinafter, the configuration of each part of the optical disc apparatus D will be described in detail.
<Mecha chassis 12>
FIG. 2 is a plan view showing a schematic configuration of the mechanical chassis 12 with the disc tray 3 and the decorative plate 10 inside the optical disc apparatus D removed. A circuit board for driving and controlling the optical disk apparatus D and a control board such as an FPC (Flexibl Print Circuit) are not shown.
The mechanical chassis 12 shown in FIG. 2 is manufactured by bending or drawing a thin plate such as SS41 (rolled steel for general structure), for example, and the optical pickup member 7 and the decorative plate 10 shown in FIG. In addition, a circuit board and the like for driving and controlling the disk tray 3 and the optical disk apparatus D are fixed and supported.

Further, the spindle motor 4 for rotating the turntable 5 and the lead screw 14 shown in FIG. 2 are rotated on the mechanical chassis 12 to place the optical pickup member 7 in the radial direction of the disk 2 on the turntable 5 (see FIG. 2). A step motor 13 and the like for reciprocating in the direction of arrow α1 are mounted.
The lead screw 14 is connected to a rotation shaft (not shown) of the step motor 13, and the lead screw 14 is rotated forward / reversely by driving the step motor 13 forward / reversely. The member 7 is reciprocated in the direction of the arrow α1 in FIG.

Further, as shown in FIG. 2, the mechanical chassis 12 is penetrated by one end side of the main shaft 16 and the auxiliary shaft 17 which are guide shafts of the optical pickup member 7 being drilled in the connecting portions 19a and 19c of the mechanical chassis 12, respectively. It is fitted in a hole (not shown, drilled in the connecting portions 19a and 19c extending in the direction perpendicular to the paper surface of FIG. 2).
On the other hand, the other end sides of the main shaft 16 and the sub shaft 17 are respectively connected to through holes (not shown, connecting portions 19b and 19d extending in the direction perpendicular to the paper surface of FIG. And is mounted on a compression coil spring (not shown) disposed in the connecting portions 19b and 19d and is fixed from above with a set screw n. For the main shaft 16 and the sub shaft 17, for example, a stainless steel rod such as SUS303 is used.

Here, when the main shaft 16 and the sub shaft 17 are fixed to the connecting portions 19b and 19d of the mechanical chassis 12 via compression coil springs, the disk 2 placed on the turntable 5 is rotated by the elastic action of the springs. The forced vibration of the mechanical chassis 12 accompanying this is suppressed from being transmitted to the optical pickup member 7 on which the laser element 8a, the laser light receiving element 8b and the like are mounted.
As described above, forced vibration is generated in the mechanical chassis 12 due to the rotation of the disk 2 at the time of data recording and reproduction. Therefore, the disk tray 3 has a viscous resistance and is provided with a vibration damping rubber 20 having a vibration damping effect. It is fixed to the mechanical chassis 12.
An under cover, which is a thin plate member, is usually inserted between the mechanical chassis 12 and the bottom plate cover 1a, but is omitted in the attached drawings.

<Optical pickup member 7>
The optical pickup member 7 shown in FIG. 2 includes a laser element 8a that oscillates laser light for recording and reproducing data, a laser light receiving element 8b that detects reflected light of the laser light from the disk 2, and data recording. , An optical lens 9 for condensing the laser beam during reproduction, and an optical unit having a prism, a mirror and the like that form an optical path of the laser beam between the disk 2 and the laser element 8a and the laser light receiving element 8b during data recording and reproduction (Not shown) and an optical pickup control circuit such as a laser circuit for the laser element 8a, a circuit for the laser light receiving element 8b, and a circuit for adjusting the focal length of the optical lens 9.

The structure that supports the components of the optical pickup member 7 is formed by, for example, zinc die casting, magnesium die casting, aluminum die casting, or the like. Magnesium die casting is suitable for the structure of the optical pickup member 7 because it is lightweight, and zinc die casting is most desirable because it is inexpensive and suitable for mass production.
The optical pickup member 7 is fixed to a connecting member 15 such as a polyacetal nut that is screwed into the lead screw 14 and moves the optical pickup member 7 in the axial direction by the rotation of the lead screw 14.

Further, a sintered bearing (not shown) through which the main shaft 16 of the guide shaft is inserted is disposed at one side end portion 18a1, 18a2 of the optical pickup member 7, and a sub shaft is disposed at the other side end portion 18b. The optical pickup member 7 is configured to be guided along the main shaft 16 and the sub shaft 17.
With this configuration, when the step motor 13 is driven to rotate forward / reversely, the lead screw 14 is rotated forward / reversely, and the connecting member 15 moves along with the forward / reverse rotation of the lead screw 14, and the two guide shafts 16 are moved. , 17, the optical pickup member 7 to which the connecting member 15 is fixed is reciprocated in the direction of the arrow α 1, that is, in the radial direction of the disk 2, as shown in FIG.

Laser light oscillated from the laser element 8a mounted in the optical pickup member 7 passes through an optical unit (not shown) and is irradiated from the optical lens 9 to the recording layer of the disk 2 to record data on the disk 2. Is called.
On the other hand, when reproducing the data recorded on the disk 2, the reflected light from the disk 2 of the laser light oscillated from the laser element 8a passes through the optical unit from the optical lens 9 and is received by the laser light receiving element 8b and detected. Then, playback is performed.

The mounting positions of the laser element 8a and the laser light receiving element 8b shown in FIG. 2 are merely examples, and the mounting positions of the laser element 8a and the laser light receiving element 8b are different for each optical pickup member 7.
In order to promote the heat radiation of the laser element 8a with respect to the laser elements 8a having different mounting positions for each optical pickup member 7, the optical pickup member 7 (see FIG. 1A) is provided at the outermost peripheral position of the disk 2. When moved, that is, when moved to a position where the temperature of the laser element 8a shows the maximum value (laser element 8a shown by a broken line in FIG. 1A), the air flow generated by the rotation of the disk 2 is changed to this position. It is desirable to introduce locally to the periphery of the laser element 8a.

<Decorative board 10>
Between the optical pickup member 7 shown in FIG. 1A and the disk 2 mounted on the turntable 5, electromagnetic waves from a circuit board or the like mounted on the mechanical chassis 12 are shielded, and the optical pickup member 7 In order to prevent the FPC attached to the optical pickup member 7 from projecting toward the disk 2 when it moves to the inner periphery of the disk 2, a decorative board 10 is provided.
FIG. 3 is a plan view showing the decorative board 10 in the optical disc apparatus D. FIG. In FIG. 3, the turntable 5 and the disc chuck 6 attached to the rotation shaft of the spindle motor 4 are shown by solid lines, and the optical pickup member 7 moved to the outermost peripheral position of the mounted disc 2 is shown by a two-dot chain line. Show.

The decorative board 10 shown in FIG. 3 is formed in a shape that covers the entire surface of the mechanical chassis 12 and has a predetermined strength so as to shield the circuit board mounted on the mechanical chassis 12 and suppress the protrusion of the FPC. For example, an aluminum plate having a thickness of approximately 0.3 mm is formed by drawing a part of the outer edge toward the mechanical chassis 12 side.
As shown in FIG. 3, the decorative plate 10 is provided with an opening 11 having a shape in which a part of the turntable 5 and the optical pickup member 7 that reciprocates can protrude from the center.
In addition, the decorative plate 10 has an optical pickup member 7 indicated by a two-dot chain line in FIG. 3 substantially in a region substantially facing the laser element 8a when moved to the outermost peripheral position of the mounted disc 2 and its vicinity. A triangular air guide hole 21 is perforated.

<Disc tray 3>
4 is a view showing the disc tray 3, and FIG. 4 (a) is a plan view showing the surface side of the disc tray 3 with the bottom cover 1 removed in FIG. 1, and FIG. 4 (b). FIG. 4C is a plan view of the single disk tray 3 as viewed from the back surface 3a side, and FIG. 4C shows the vicinity of the air guide wall 22 formed on the back surface 3a of the disk tray 3 shown in FIG. It is the expansion perspective view seen from.
The disc tray 3 is formed by injection molding using, for example, ABS (Acrylonitrile, Butadiene, Styrene copolymer synthetic resin) or the like as a base material, and the disc tray 3 is rotated with respect to the disc 2 mounted on the turntable 5. It is formed in a shape that covers with a certain clearance so as not to contact. The front portion of the disc tray 3 is generally referred to as a front bezel 101.

  As shown in FIG. 4 (a), the disc tray 3 has a recording surface and an outer peripheral surface of the disc 2 placed on the turntable 5 on the surface 3b side on which the disc 2 is arranged. In order to prevent contact, a short cylindrical recess 3o having a certain clearance and covering is formed, and the opening 3k for arranging the decorative board 10 is slightly larger than the outer shape of the decorative board 10 Drilled with large dimensions.

The disc tray 3 is mounted on the back surface 3a (see FIG. 4B) facing the optical pickup member 7 that has moved to the outermost periphery of the mounted disc 2, as shown in FIG. 4A. The outermost peripheral edge of the disk 2 is spatially contacted, and the virtual contact point 2a to the outer edge of the air guide hole 21 of the decorative plate 10 is the same as the rotation direction of the disk 2 (the direction of arrow α2 in FIG. 4A). A wind guide wall 22 (see FIG. 4B and FIG. 4C) is provided in a rib shape along a smooth line connecting in the direction.
FIG. 5 is an enlarged cross-sectional view taken along line CC of the air guide wall 22 and the decorative board 10 of FIG.
At the time of data recording and reproduction of the mounted disk 2, vibration occurs in the mechanical chassis 12 as the disk 2 rotates. Therefore, as shown in FIG. 5, the decorative plate 10 attached to the mechanical chassis 12 by screwing and the disk tray A gap s <b> 1 is provided between the decorative plate 10 and the air guide wall 22 of the disk tray 3 so as not to directly contact with the plate 3.

FIGS. 6A to 6D are enlarged cross-sectional views taken along the line C-C showing other examples of the air guide wall 22 and the decorative plate 10 of FIG.
The air guide wall 22 shown in FIG. 5 is provided perpendicular to the disc tray back surface 3a. However, as shown in FIGS. 6 (a) to 6 (d), the air guide wall 22 is provided on the disc tray back surface 3a. You may form in the shape inclined with respect to.

<Playback / recording operation of disc 2>
Next, the reproduction / recording operation of the disc 2 loaded in the optical disc apparatus D will be described.
When the disc 2 is loaded in the optical disc apparatus D, when the user presses an eject button (not shown), the disc tray 3 automatically moves on a guide (not shown) provided in the apparatus D, As shown by an arrow β1 in FIG. 1A, the optical disk apparatus D is taken out.
Subsequently, the user places the disk 2 on the turntable 5 connected to the spindle motor 4 and fixes the central hole of the disk 2 with the disk chuck 6 exposed from the opening 3k of the disk tray 3, 2 is mounted in the short cylindrical recess 3o of the disc tray 3.

  Subsequently, when the user pushes the disk tray 3 loaded with the disk 2 into the optical disk apparatus D as indicated by an arrow β2 in FIG. 1A, the disk tray 3 loaded with the disk 2 is It moves on a guide (not shown) inside the apparatus D and is mounted in the optical disc apparatus D. As described above, the disk tray 3 moves on the guide provided in the apparatus D, whereby the disk 2 is loaded into the apparatus D and the disk 2 is removed from the apparatus D.

  Subsequently, when the user presses the record / playback button, the spindle motor 4 is driven to rotate by the drive circuit mounted on the mechanical chassis 12, and the disk 2 on the turntable 5 is rotated clockwise (FIG. 1 (a). ) And rotate in the direction of arrow α2 in FIG. Further, the step motor 13 (see FIG. 2) is driven and controlled by the drive circuit on the mechanical chassis 12, and the connecting member 15 screwed to the lead screw 14 is moved by the rotation of the lead screw 14 connected to the step motor 13. Along with this, the optical pickup member 7 is fed and moved in the radial direction of the disk 2 (the direction of the arrow α1 in FIG. 2).

  In this way, the optical pickup member 7 is moved from the inner periphery to the outer periphery of the disk 2 while the disk 2 is rotated, and the optical lens 9 is irradiated with the laser light from the laser element 8a (see FIG. 1A). The data is recorded on the recording surface of the disk 2 via the. Alternatively, the laser light from the laser element 8a is reflected from the recording surface of the disk 2 through the optical lens 9 and is received by the laser light receiving element 8b (see FIG. 1A). Data reproduction is performed. In FIG. 1A, a case where the optical pickup member 7 is located in the middle circumference of the disk 2 is indicated by a two-dot chain line, and a case where the optical pickup member 7 is located on the outermost circumference of the disk 2 is indicated by a solid line.

Here, when performing multi-layer (two-layer) recording and reproduction on the disc 2, at the time of recording / reproduction of the first layer, the optical pickup member 7 moves from the inner peripheral portion toward the outer peripheral portion of the disc 2, and further two layers. At the time of recording / reproduction of the eyes, the disk 2 returns from the outer peripheral portion toward the inner peripheral portion, and recording / reproduction is performed using the laser element 8a and the laser light receiving element 8b.
At this time, the optical pickup member 7 has two guide shafts installed in parallel to the mechanical chassis 12 via both side end portions (bearing portions) 18a1, 18a2, 18b as shown by an arrow α1 in FIG. It moves along the main shaft 16 and the sub shaft 17.

<Effect>
According to the above configuration, when the optical pickup member 7 moves to the outermost peripheral position of the disk 2 (solid optical pickup member 7 in FIG. 1A), that is, moves to a position where the temperature of the laser element 8a shows the maximum value. Then, the air swirl flow γ1 (see FIGS. 7 and 8) flowing along the outer edge of the disk 2 due to the clockwise rotation of the disk 2 (in the direction of arrow α2 in FIGS. 1A and 4A), It can be guided to the air guide hole 21 along the air guide wall 22 provided in the disc tray 3 (air flow γ2 toward the air guide hole 21 along the air guide wall 22 shown in FIGS. 7 and 8), Furthermore, it is possible to locally introduce an air flow (arrow γ3 in FIG. 8) to the periphery of the laser element 8a of the optical pickup member 7 through the air guide hole 21.

  7 and 8 are diagrams schematically showing the air flow at this time by arrows γ1, γ2, and γ3. FIG. 7 shows the air guide hole 21 along the air guide wall 22 of the disc tray 3. FIG. 8 is a plan view showing a schematic configuration of the inside of the optical disc apparatus D in which the airflow flowing up to is represented by arrows γ1 and γ2, and FIG. 8 flows to the air guide hole 21 along the air guide wall 22 of the disc tray 3 ( FIG. 6 is a perspective view showing a schematic configuration inside the optical disc apparatus D in which an air flow flowing into the vicinity of the laser element 8a through the air guide hole 21 after the arrow γ2) is represented by an arrow γ3. In FIG. 8, the disk tray 3 is omitted for easy understanding.

As shown in FIG. 7, the air swirling flow γ1 at the outer edge of the disk 2 generated by the clockwise rotation of the disk 2 is guided along the air guide wall 22 of the disk tray 3 to the air guide hole 21 ( After the arrow γ2), the air swirl flow γ1 (see FIGS. 7 and 8) accompanying the rotation of the disk 2 is generated because the air can be poured into the vicinity of the laser element 8a through the air guide hole 21 as shown in FIG. The optical pickup member 7 can be smoothly introduced to the vicinity of the laser element 8a.
Therefore, the flow velocity of air around the laser element 8a of the optical pickup member 7 is greatly increased, and the heat generated from the laser element 8a can be effectively dissipated by air convection.

FIG. 9 is a diagram showing the heat dissipation acceleration effect of the first embodiment, and shows the flow rate ratio around the laser elements 8a of the comparative example and the first embodiment.
The graph of FIG. 9 is an analysis of the flow velocity around the laser element 8a by measuring the flow field around the laser element 8a when the rotational speed corresponding to the low-speed recording is applied to the disk 2 and the flow field by a numerical fluid simulation. It is.
As shown in FIG. 9, it is clear that the flow rate of the first embodiment increases 2.6 times compared to the comparative example.

<Modification of First Embodiment>
FIG. 10 is a plan view showing the structure of the decorative plate 10 of the optical disc apparatus D according to a modification of the first embodiment.
FIG. 11A is a plan view showing the structure of the disc tray of the optical disc device according to the modification of the first embodiment, and FIG. 11B is the disc of the optical disc device D according to the variant of the first embodiment. It is the top view which showed the back surface 3a of the tray 3 single-piece | unit.

  As shown in FIGS. 10 and 11, when the attachment position of the laser element 8 a of the optical pickup member 7 is different from the position shown in FIG. 2 of the first embodiment, the air guide hole 21 formed in the decorative board 10. For example, as shown in FIG. 10, the location and the shape are changed according to the position of the laser element 8 a moved to the outermost peripheral position of the disk 2, and the shape of the air guide wall 22 formed on the disk tray 3 is changed. For example, as shown in FIGS. 11 (a) and 11 (b), the position is changed according to the position of the laser element 8 a moved to the outermost peripheral position of the disk 2.

Here, the shape of the air guide wall 22 may be a curved shape shown in FIG. 11 or a linear shape.
Thus, according to the mounting position of the laser element 8 a of the optical pickup member 7, the location of the air guide hole 21 formed in the decorative plate 10, the shape and the location of the air guide wall 22 formed in the disc tray 3, By appropriately changing the shape, it is possible to obtain the heat radiation promoting effect of the laser element 8a as in the first embodiment.

<< Second Embodiment >>
Next, an optical disc apparatus D according to the second embodiment will be described with reference to FIGS.
FIG. 12A is a plan view of the decorative plate 10 of the optical disc apparatus D of the second embodiment, and FIG. 12B shows the addition of the disc tray 3 to the decorative plate 10 shown in FIG. It is the DD sectional view enlarged view in the case of.
In the optical disc device D2 of the second embodiment, the air guide wall 22 formed on the disc tray 3 of the first embodiment is provided on the decorative plate 10 as the air guide wall 10b instead of the disc tray 3.
Since the other configuration is the same as that of the first embodiment, the same components are denoted by the same reference numerals, and detailed description thereof is omitted.

As shown in FIG. 12A, the optical disc device D2 of the second embodiment has an optical pickup indicated by a two-dot chain line in FIG. 12A when the optical pickup member 7 moves to the outermost peripheral position of the disc 2. The member 7) is provided with an air guide hole 21 in a region of the decorative plate 10 facing the laser element 8a of the optical pickup member 7 and in the vicinity thereof.
Further, as shown in FIG. 12A, the rotation direction of the disk 2 extends from the virtual contact 2a to the air guide hole 21 provided in the decorative plate 10 in contact with the outer edge of the disk 2 mounted on the turntable 5. A wind guide wall 10b is provided on the decorative board 10 along a smooth line connecting in the same direction as (in the direction of arrow α2 in FIG. 12A) (see FIG. 12B).

At the time of data recording on the mounted disk 2 and reproduction from the disk 2, forced vibration is generated in the mechanical chassis 12 as the disk 2 rotates, so that the decorative plate 10 that is screwed to the mechanical chassis 12 and integrated with the mechanical chassis 12. As shown in FIG. 12B, a gap s <b> 2 is provided between the air guide wall 10 b of the decorative plate 10 and the disc tray 3 so that the disc tray 3 and the disc tray 3 do not directly contact each other.
FIGS. 13A to 13D are enlarged sectional views taken along the line D-D of a modified example in which the disc tray 3 is added to FIG.
In FIG. 12B, the case where the air guide wall 10b is provided perpendicular to the decorative board 10 is illustrated, but as shown in FIGS. 13A to 13D, the air guide wall 10b is provided. You may provide 10b in the shape inclined with respect to the decorative board 10. FIG.

According to the above configuration, when the optical pickup member 7 moves to the outermost peripheral position of the loaded disc 2, that is, when the temperature of the laser element 8a of the optical pickup member 7 moves to a position where the maximum value is reached, the disc 2 The air swirling flow generated along the outer edge of the light guide plate 10 can be guided to the air guide hole 21 along the air guide wall 10 b provided on the decorative plate 10, and further, the laser element 8 a of the optical pickup member 7 through the air guide hole 21. The air flow can be introduced locally up to
Since the air flow at the outer edge of the disk 2 having a relatively high flow velocity can be smoothly introduced to the vicinity of the laser element 8a of the optical pickup member 7, the flow velocity of the air flow around or near the laser element 8a of the optical pickup member 7 is greatly increased. It is possible to effectively dissipate heat generated from the laser element 8a by convection of the air flow.

<Modification of Second Embodiment>
Next, a modification of the optical disc device D2 of the second embodiment will be described with reference to FIG. FIG. 14 is a plan view of the decorative plate 10 when the mounting position of the laser element 8a of the optical disc apparatus D according to the modification of the second embodiment is changed.
The modification of the second embodiment is a configuration corresponding to a case where the mounting position of the laser element 8a of the optical pickup member 7 of the second embodiment is changed.

In the second embodiment, when the mounting position of the laser element 8a is different from the position shown in FIG. 12, for example, as shown in FIG. 14, the location and shape of the air guide hole 21 ′ and the air guide wall 10b ′ are changed. The effect of promoting the heat radiation of the laser element 8a of the optical pickup member 7 can be obtained in the same manner as in the second embodiment by appropriately changing the position according to the position of the laser element 8a moved to the outermost peripheral position of the disk 2. it can.
The shape of the air guide wall 10b ′ may be a curved line shown in FIG. 14 or a straight line.

<< Third Embodiment >>
Next, a third embodiment will be described with reference to FIG. FIG. 15 is an enlarged sectional view taken along the line CC of FIG. 4A of the third embodiment.
In the third embodiment, a wind guide wall following the wind guide hole 21 of the decorative plate 10 is provided on both the disc tray 3 and the decorative plate 10.
In the third embodiment, similarly to FIG. 4A, when the optical pickup member 7 is moved to the outermost peripheral position of the disk 2, the laser element 8a of the optical pickup member 7 on the decorative plate 10 and Air guide holes 21 are formed in the substantially opposed region and the vicinity thereof.

  Further, the back surface 3a and the decorative plate 10 of the optical pickup member 7 that has moved to the outermost peripheral portion of the disk 2 on the back surface 3a of the disk tray 3 are respectively shown in FIG. 4 (a). ) In contact with the outer edge of the mounted disc 2 and from the virtual contact 2a to the air guide hole 21 provided in the decorative plate 10, the rotational direction of the disc 2 (FIG. 1 (a), FIG. As shown in FIG. 15, the air guide wall 22 a is provided on the disc tray 3 and the air guide wall 22 b is provided on the decorative plate 10 along a smooth line connecting in the same direction as the arrow α2 direction of a). .

  The air guide walls 22a and 22b shown in FIG. 15 exemplify cases in which the air guide walls 22a and 22b are formed perpendicular to the disc tray back surface 3a and the decorative plate 10, respectively. As in the first embodiment and the second embodiment, The air guide walls 22a and 22b may be formed to be inclined with respect to the disc tray back surface 3a and the decorative plate 10, respectively (see FIGS. 6 and 13).

According to the above configuration, when the optical pickup member 7 moves to the outermost peripheral position of the disk 2 mounted on the turntable 5, that is, when the temperature of the laser element 8a of the optical pickup member 7 moves to a position where the maximum value is shown. The air swirl generated along the outer edge of the disk 2 can be guided to the air guide holes 21 of the decorative board 10 along the air guide walls 22a and 22b. An air flow can be locally introduced to the periphery of the laser element 8 a of the pickup member 7.
Accordingly, since the air flow at the outer edge of the disk 2 having a relatively high flow velocity can be smoothly introduced to the vicinity of the laser element 8a, the flow velocity of the air flow around the laser element 8a is greatly increased, and the heat generated from the laser element 8a is increased. Can be effectively dissipated by convection of airflow.

  Further, as shown in FIG. 15, the air guide wall 22 b provided on the decorative plate 10 and the air guide wall 22 a provided on the disc tray 3 include a direction in which the decorative plate 10 extends and a direction in which the disc tray 3 extends. Are formed in a staggered manner perpendicular to each other, and the swirling flow of air that occurs with the rotation of the disk 2 and flows in the extending direction of the disk 2 (the left-right direction of the paper surface of FIG. 15) It is shielded by the air guide wall 22a of the tray 3, and can efficiently guide the air to the air guide hole 21 of the decorative board 10. Therefore, the laser element 8a of the optical pickup member 7 can be cooled more effectively.

<< Fourth Embodiment >>
Next, a fourth embodiment will be described with reference to FIG. FIG. 16 is a plan view including a partially cutout portion around the disc tray 3 of the fourth embodiment.
As shown in FIG. 16, in the fourth embodiment, when the optical pickup member 7 moves to the outermost peripheral position of the disk 2 through the connecting member 15 as the lead screw 14 (see FIG. 2) rotates, An air guide hole 21 is provided in a region of the plate 10 facing the laser element 8 a of the optical pickup member 7, and a disk is placed on the back surface 3 a of the disk tray 3 facing the optical pickup member 7 moved to the outermost periphery of the disk 2. A wind guide wall 22 extending from the outer vertical wall 3d of the tray 3 (formed in a direction perpendicular to the paper surface of FIG. 16) or the vicinity thereof to the wind guide hole 21 of the decorative board 10 is provided.

According to the above configuration, when the optical pickup member 7 moves to the outermost peripheral position of the disk 2, that is, when the temperature of the laser element 8 a of the optical pickup member 7 moves to the position where the maximum value is reached, the disk 2 rotates. The air swirling flow to be guided can be guided to the air guide hole 21 along the outer vertical wall 3d and the air guide wall 22 of the disc tray 3, and further through the air guide hole 21 of the laser element 8a of the optical pickup member 7. Air flow can be introduced locally to the surroundings.
The air guide wall 22 may be perpendicular to the disc tray back surface 3a as shown in FIGS. 16 and 5, or may be inclined as shown in FIG. Moreover, the shape of the air guide wall 22 may be a linear shape shown in FIG. 16 or a curved shape.

<< Fifth Embodiment >>
Next, a fifth embodiment will be described with reference to FIG. FIG. 17A is a plan view around the disc tray 3 of the fifth embodiment, and FIG. 17B is a diagram showing the flow of air flowing through the air guide hole 21 with an arrow γ4. It is the EE sectional view enlarged view of).
As shown in FIG. 17, in the fifth embodiment, in the first to fourth embodiments, the upstream of the air flow due to the rotation of the disk 2 with respect to the air guide holes 21 of the decorative plate 10 on the disk tray back surface 3 a. This is a configuration in which a protrusion 23 having an inclination approaching the air guide hole 21 in the rotational axis direction of the disk 2 is provided obliquely from the disk tray back surface 3a in the same direction as the air flow direction at a position corresponding to the side. In FIG. 17A, the air guide wall 22 is omitted.

  According to the above configuration, when the optical pickup member 7 is moved to the outermost peripheral position of the disk 2, that is, when the temperature of the laser element 8 a of the optical pickup member 7 is moved to a position where the maximum value is reached, the disk 2 is rotated. The air flow is guided to the vicinity of the air guide hole 21 along the air guide wall 22, and further guided by the protrusion 23 on the back surface 3a of the disc tray. The air flow is indicated by an arrow γ4 in FIG. As described above, it can be effectively introduced to the periphery of the laser element 8 a of the optical pickup 7 through the air guide hole 21.

<< Other variations >>
As described above, in the first to fifth embodiments, since the forced vibration generated in the mechanical chassis 12 due to the rotation of the disk 2 is not transmitted to the disk tray 3, as shown in FIG. A gap s1 is provided between the wind wall 22 and the decorative plate 10, and a gap s2 is provided between the wind guide wall 10b of the decorative plate 10 and the disc tray 3, as shown in FIG. .
18A is a cross-sectional view showing a configuration in which a sponge-like member 24a is sandwiched between the air guide wall 22 provided on the disc tray 3 and the decorative plate 10, and FIG. 18B is a decorative plate. 10 is a cross-sectional view showing a configuration in which a sponge-like member 24b is sandwiched between the air guide wall 22 and the disc tray 3 provided in FIG.

As shown in FIG. 18A, a sponge-like member 24a that absorbs vibration may be sandwiched between the air guide wall 22 of the disc tray 3 and the decorative plate 10, or FIG. ), A sponge-like member 24b that absorbs vibration may be sandwiched between the air guide wall 22 of the decorative board 10 and the disc tray 3.
As described above, the sponge-like member 24 a is provided between the air guide wall 22 and the decorative plate 10, and the sponge-like member 24 b is provided between the air guide wall 22 and the disc tray 3. The forced vibration due to the rotation of 2 is attenuated by the sponge-like members 24a and 24b.

Further, as shown in FIG. 18A, the air flow caused by the rotation of the disk 2 is prevented from escaping from the gap between the air guide wall 22 and the decorative plate 10 by the sponge-like member 24a. As shown in FIG. 18 (b), escape from the gap between the air guide wall 22 and the disk tray 3 is prevented by the sponge-like member 24b, so that a larger amount of airflow is generated by the laser of the optical pickup member 7. The air can be guided near the element 8a, and the cooling effect of the laser element 8a can be enhanced.
As described above, the air guide wall provided in the disc tray 3 or the decorative plate 10 or both extends from the air guide hole 21 of the decorative plate 10 or the vicinity thereof in the counter-rotating direction of the disc 2, thereby The following effects can be obtained.

<< Summary >>
According to the optical disk apparatus of the present invention, since the air flow at the outer edge of the disk having a relatively high flow velocity can be smoothly introduced to the periphery of the laser element of the optical pickup member, the heat generated from the laser element is effectively radiated. It becomes possible to make it. Thereby, it is possible to suppress the life deterioration of the laser element by suppressing the temperature rise of the laser element, and it is possible to achieve the performance improvement of the optical disc apparatus.
In addition, the structure applied in the first to fifth embodiments can exert a heat radiation promoting effect in recording and reproduction of the disk 2 other than multi-layer recording.

  In the first to fifth embodiments, a notebook personal computer has been described as an electronic apparatus to which the optical disk apparatus is applied. However, as an electronic apparatus in which the optical disk apparatus of the present invention is mounted, a notebook type is used. In addition to a personal computer, any electronic device equipped with an optical disk such as an in-vehicle computer such as a car navigation system, a camera equipped with an optical disk, or a game machine can be widely applied without limitation.

(a) is a plan view including a partly cutout portion showing an outline of the internal configuration of the optical disc apparatus according to the first embodiment of the present invention, and (b) is a surface view of the optical disc apparatus shown in (a). It is an AA line section enlarged view in the state where the decorative board was attached to the side. It is the top view which showed schematic structure of the mechanical chassis of the state which removed the disc tray and the decorative board in the optical disc apparatus of 1st Embodiment. It is a top view which shows the decorative board in the optical disk apparatus of 1st Embodiment. (a) is a plan view showing the front side of the disc tray with the bottom plate cover removed in FIG. 1, (b) is a plan view of the disc tray as viewed from the back side, and (c) is a plan view. 5B is an enlarged perspective view of the vicinity of the air guide wall formed on the back surface of the disc tray shown in FIG. FIG. 5 is an enlarged cross-sectional view taken along the line CC of the wind guide wall and the decorative board in FIG. (a)-(d) is CC sectional view enlarged on the CC line which shows the other example of the baffle wall and decorative panel of Fig.4 (a). FIG. 3 is a plan view showing a schematic configuration inside the optical disc apparatus in which an air flow flowing along the air guide wall of the disc tray of the first embodiment to the air guide hole is indicated by arrows. The perspective view which showed schematic structure inside the optical disk apparatus which represented the air flow which flows into the laser element vicinity through the air guide hole after flowing to the air guide hole along the air guide wall of the disc tray of 1st Embodiment with the arrow. It is. It is a figure which shows the heat dissipation promotion effect of 1st Embodiment. It is the top view which showed the structure of the decorative board of the optical disk device of the deformation | transformation form of 1st Embodiment. FIG. 5A is a plan view including a partially cutout portion showing a structure of a disc tray according to a variation of the optical disc apparatus of the first embodiment, and FIG. 5B is a variation of the optical disc device according to the first embodiment. It is the top view which showed the back surface of the disc tray single-piece | unit. (a) is a top view of the decorative board of the optical disk apparatus of 2nd Embodiment, (b) is a DD line cross-sectional enlarged view at the time of adding the disk tray 3 to the decorative board shown to (a). is there. (a)-(d) is the DD sectional enlarged sectional view of a deformation | transformation form at the time of adding a disk tray to the decorative board shown to Fig.12 (a). It is a top view of a decorative board when the attachment position of the laser element of the optical disc device of the modification of 2nd Embodiment is changed. It is the CC sectional view enlarged view of Fig.4 (a) of 3rd Embodiment. It is a top view including the notch part of the circumference | surroundings of the disc tray 3 of 4th Embodiment. (a) is a plan view around the disc tray of the fifth embodiment, and (b) is an enlarged cross-sectional view taken along the line EE of FIG. (a) is sectional drawing which shows the structure which sandwiched the sponge-like member between the baffle wall provided in the disc tray, and the decorative board, (b) is the baffle wall provided in the decorative board, and the disc It is sectional drawing which shows the structure which pinched sponge-like members between trays.

Explanation of symbols

2 disc 3 disc tray (disc tray member)
3a The back of the disc tray (the surface facing the optical pickup member)
4 Spindle motor (disk rotation mechanism)
5 Turntable (disk rotation mechanism)
7 Optical pickup member 8a Laser element 10 Decorative plate (decorative plate material)
10b Wind guide wall (wind guide wall portion of claim 2)
13 Step motor (feed mechanism)
14 Lead screw (feed mechanism)
15 Connecting member (feed mechanism)
16 Spindle (feed mechanism)
17 Sub shaft (feed mechanism)
21 Air guide hole 22 Air guide wall (wind guide wall)
22a Air guide wall (the air guide wall portion of the disc tray member of claim 3)
22b Wind guide wall (the wind guide wall portion of the decorative board material of claim 3)
23 Protrusion D Optical disk device α2 Disk rotation direction

Claims (6)

A disk tray member used for loading and unloading a disk, which is an information recording medium, an optical pickup member having a laser element that oscillates a laser beam applied to the disk, a disk rotating mechanism for rotating the disk, and the light An optical disc apparatus comprising a feeding mechanism for moving a pickup member between an inner peripheral portion and an outer peripheral portion of the disc, and a decorative plate material provided between the mounted disc and a control portion to be mounted,
The decorative plate material has air guide holes that allow air to flow to a region facing the laser element of the optical pickup member when the optical pickup member moves to the outermost peripheral portion of the disk to be rotated,
The disc tray member has an air guide wall portion extending in the counter-rotating direction of the disc from the air guide hole or the vicinity thereof on a surface facing the optical pickup member moved to the outermost peripheral portion of the disc. An optical disc device characterized. A disk tray member used for loading and unloading a disk, which is an information recording medium, an optical pickup member having a laser element that oscillates a laser beam applied to the disk, a disk rotating mechanism for rotating the disk, and the light An optical disc apparatus comprising a feeding mechanism for moving a pickup member between an inner peripheral portion and an outer peripheral portion of the disc, and a decorative plate material provided between the mounted disc and a control portion to be mounted,
The decorative plate material is provided in a region facing the laser element of the optical pickup member when the optical pickup member is moved to the outermost peripheral portion of the disk to be rotated, and the air guide hole that allows air to flow therethrough, An optical disc apparatus comprising: an air guide wall portion extending in the counter-rotating direction of the disc from or near the air guide hole so as to face the optical pickup member moved to the outermost peripheral portion of the disc. A disk tray member used for loading and unloading a disk, which is an information recording medium, an optical pickup member having a laser element that oscillates a laser beam applied to the disk, a disk rotating mechanism for rotating the disk, and the light An optical disc apparatus comprising a feeding mechanism for moving a pickup member between an inner peripheral portion and an outer peripheral portion of the disc, and a decorative plate material provided between the mounted disc and a control portion to be mounted,
An air guide hole is provided to allow air to flow in the region of the decorative plate facing the laser element of the optical pickup member that has moved to the outermost peripheral portion of the disk to be rotated; and
An air guide wall portion extending in the counter-rotating direction of the disc from the air guide hole or its vicinity to the surface of the disc tray member facing the optical pickup member moved to the outermost peripheral portion of the disc and the decorative plate member Are provided, respectively. In the optical disc device according to any one of claims 1 to 3,
On the surface of the disc tray that faces the optical pickup member that has moved to the outermost peripheral portion of the disc, there is a protrusion having an inclination that gradually approaches the air guide hole in the direction of the disc rotation axis as it advances in the disc rotation direction. An optical disc apparatus characterized by being provided. In the optical disc device according to any one of claims 1 to 4,
The optical guide device, wherein the air guide wall portion is formed continuously to the air guide hole along the outer edge of the disk. An electronic apparatus comprising the optical disc device according to any one of claims 1 to 5.

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